Stabilisation effects of superparamagnetic nanoparticles on clustering in nanocomposite microparticles and on magnetic behaviour

被引：26
作者：
Mandel, K. [1 ,2 ]
Hutter, F. [1 ]
Gellermann, C. [1 ]
Sextl, G. [1 ,2 ]
机构：
[1] Fraunhofer Inst Silicate Res, ISC, D-97082 Wurzburg, Germany
[2] Univ Wurzburg, Chair Chem Technol Mat Synth, D-97070 Wurzburg, Germany
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2013年 / 331卷
关键词：
Nanoparticle stabilization; Nanocomposite; Superparamagnetism; Blocking temperature; Zero field cooled/field cooled measurement; SILICA-NANOPARTICLES; FE3O4; NANOPARTICLES; IRON PARTICLES; MATRIX; RELAXATION; SURFACE; NANOCRYSTALS; SEPARATION;
D O I：
10.1016/j.jmmm.2012.11.053
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Superparamagnetic nanoparticles of magnetite were coprecipitated from iron salts, dispersed with nitric acid and stabilised either by lactic acid (LA) or by a polycarboxylate-ether polymer (MELPERS4343, MP). The differently stabilised nanoparticles were incorporated into a silica matrix to form nanocomposite microparticles. The silica matrix was prepared either from tetraethylorthosilicate (TEOS) or from an aqueous sodium silicate (water glass) solution. Stabilisation of nanoparticles had a crucial influence on microparticle texture and nanoparticle distribution in the silica matrix. Magnetic measurements in combination with transmission electron microscopy (TEM) investigations suggest a uniform magnetic interaction of nanoparticles in case of LA stabilisation and magnetically interacting nanoparticle clusters of different sizes in case of MP stabilisation. Splitting of blocking temperature (T-B) and irreversible temperature (T-ir) in zero field cooled (ZFC) and field cooled (FC) measurements is discussed in terms of nanoparticle clustering. (C) 2012 Elsevier B.V. rights reserved.
引用
收藏
页码：269 / 275
页数：7
相关论文
共 36 条
[21]   Superparamagnetism of magnetite nanoparticles: Dependence on surface modification [J].
Mikhaylova, M ;
Kim, DK ;
Bobrysheva, N ;
Osmolowsky, M ;
Semenov, V ;
Tsakalakos, T ;
Muhammed, M .
LANGMUIR, 2004, 20 (06) :2472-2477
[22]   Surface and internal spin canting in γ-Fe2O3 nanoparticles [J].
Morales, MP ;
Veintemillas-Verdaguer, S ;
Montero, MI ;
Serna, CJ ;
Roig, A ;
Casas, L ;
Martínez, B ;
Sandiumenge, F .
CHEMISTRY OF MATERIALS, 1999, 11 (11) :3058-3064
[23]   SUPERPARAMAGNETIC RELAXATION OF WEAKLY INTERACTING PARTICLES [J].
MORUP, S ;
TRONC, E .
PHYSICAL REVIEW LETTERS, 1994, 72 (20) :3278-3281
[24]   SUPERPARAMAGNETISM AND SPIN-GLASS ORDERING IN MAGNETIC NANOCOMPOSITES [J].
MORUP, S .
EUROPHYSICS LETTERS, 1994, 28 (09) :671-676
[25]   Spin-glass behavior in an interacting γ-Fe2O3 nanoparticle system [J].
Parker, D. ;
Dupuis, V. ;
Ladieu, F. ;
Bouchaud, J. -P. ;
Dubois, E. ;
Perzynski, R. ;
Vincent, E. .
PHYSICAL REVIEW B, 2008, 77 (10)
[26]   Superparamagnetic nanoparticle ensembles [J].
Petracic, O. .
SUPERLATTICES AND MICROSTRUCTURES, 2010, 47 (05) :569-578
[27]   Thermomagnetic determination of Fe3O4 magnetic nanoparticle diameters for biomedical applications [J].
Plouffe, Brian D. ;
Nagesha, Dattatri K. ;
DiPietro, Robert S. ;
Sridhar, Srinvas ;
Heiman, Don ;
Murthy, Shashi K. ;
Lewis, Lewis H. .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2011, 323 (17) :2310-2317
[28]   Magnetic response of NiFe2O4 nanoparticles in polymer matrix [J].
Poddar, A. ;
Bhowmik, R. N. ;
De, Amitabha ;
Sen, Pintu .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2009, 321 (13) :2015-2020
[29]   Magnetic poly(glycidyl methacrylate) microspheres containing maghemite prepared by emulsion polymerization [J].
Pollert, E. ;
Knizek, K. ;
Marysko, M. ;
Zaveta, K. ;
Lancok, A. ;
Bohacek, J. ;
Horak, D. ;
Babic, M. .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2006, 306 (02) :241-247
[30]   Superparamagnetic nanocomposites based on poly(styrene-b-ethylene/butylene-b-styrene)/cobalt ferrite compositions [J].
Rajan, GS ;
Stromeyer, SL ;
Mauritz, KA ;
Miao, GX ;
Mani, P ;
Shamsuzzoha, M ;
Nikles, DE ;
Gupta, A .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2006, 299 (01) :211-218
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